ccleaner list - can someone help??

hey to all who read this
I am trying to clean up my laptop and I just ran the CCleaner application and there are a lot of things in the Uninstall section of the "Tools" button that I have no clue about. I have tried searching for them on the harddrive and searching through google about them but have turned up lacking information. Hopefully someone can tell me waht things seem like they should be deleted or not... on top of this, I recently uninstalled Norton to get ready for my new anti virus program and it still seems to be showing up on this list as well along with a live-update icon as well. any help would be appreciated greatly...
here is the list that I see:

Norton or Symantec AVs.... you have to get the removal tool particular to your version from their website to uninstall it completely.
The other uninstall entries? Well, you would not uninstall hotfixes or updates, now would you? And some apps, eg, Nero, contain several parts all of which you do not have to keep. Okay, you don't have Nero, it was just an example, and I don't have Roxio, but it seems like the same case - they have a bundle of applications which are not standalone because they run under a parent module, but you don't have to hold all the child modules.... CCleaner puts up all pgms whereas Add/Rmv Pgms in CP has a checkbox to enable you to ignore Windows Updates...
You do have Microsoft .NET Framework 1.0 Hotfix (KB887998)
Microsoft .NET Framework 1.0 Hotfix (KB930494)
and....
Microsoft .NET Framework 1.1
Microsoft .NET Framework 1.1 Hotfix (KB928366)
I only have the 1.1 and hotfix.... you could uninstall the old version 1.0 and its hotfix.